Improvement in sickle-grinders



2 Sheets-Sheet 2.

H. S. STEVENS.

SIGKLE-GRINDER. v

Patented Apri13, 1-877.

No.189,Z79

WITNESSES INVENTOR amqa *QI/QVW! H%-/MW6 PM ATTORNEYS.

N FEIERS, PHOTD-UTHOGRAPHER, WASHINGTON. D. C,

HOMER "slit iiM PRo'vEMENfTN Specification forming part of Letters Toaltwhoih may concerni v I Be it known that I, HOMER S. STEvENs,of

Waukegan, in the county of Lakeand State.

of Illinois, have inventeda new and valuable Improvement in Sickle-Grinders; and I do hereby declare .that the following is a full,

clear, and exact description of the construc-- tion and operat on of the same, reference be-' ing had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representa tion of a front elevation of my sickle-grinder, and Fig. 2 is a side elevation of the same. Figs. 3 and 4 are detail views thereof.

This invention relates to improvements in machlnes for grinding harvester-sickles; and

. each of which is provided with a brace, a, and

which are connected at the top by a vertical cross 1 piece or cross plate, B, thus complet-' ing the frame of my device. 0 designates a trough, supported between said standards A A-by means of angular arms or bars 0 .0, which are cast with, or otherwise rigidly attached to, the sides of said trough at the middle thereof. Said trough is also provided, in front of said supporting-arms, with two rigid downwardly-extending bars or plates, D D, (one of said bars being upon each side of said trough,) which are provided with perforations for adjusting the pivotal points of a U-shaped metal tilting frame, E. This tilting frame has its axis near its middle, and is provided on its upwardly-turned ends with bearings for the support of a grindstone-shaft, F, carrying grindstone G. Said shaft is extended on each side of said grindstone, and is provided with prismatic ends f f, either of which may receive a detachable crank, H, prismatically perforated at h h. The above construction of the shaft and crank en ables the grindstone to be conveniently operated from either side, when the tilting of the sickle, or other tool which is being ground, (as hereinafter described,) prevents it from being operated from I theother side.

sTnvEn's,' or WAUKEGAN, ,ILLiNois Assienon or. ONE-HALF I r 1 1s nrenrmo 'JOHNF. POWELL, or SAME PLACE.

SIKLEJ-GRIND E RS.

Patent No. 189,279, dated April 3, 1877 application filed.

November18, 18.76. I v

I Theabove construction of the shaft and crank also enables the length of said crank to be adjusted by shifting the prismatic shaft end from one hole. to another, so as to conform to the diminished size of a worn grindstone, and to the amount of power required in turning it. I v It is desirableto give to agrindstone used for sharpening harvester siokles a forward and backward and upward and downward oscillatory motion, so that it will reach and effectually grind all parts of each cutting-blade. ,This oscillatory motion is not new in suchapplicationso; but I employ a new combination of devices to produce it. To one side of the trough 0, near the front end thereof, I attach a rigid metal standard, I, to the upper endof .which is pivoted a crank-arm, J, the other end of which is secured to a socketed block, K, on a small shaft,L, which is journaled in one side of U-shaped tilting frame E, and in a rigid bar, E, parallel therewith, and secured thereto. The block K is provided with sockets k it near its outer edge, one of which receives one of the bent ends of the arm J Said short shaft L carriesbetween said tilting. frame E and said rigid bar E a cog-wheel, M, which gears with and is turned by a similar cogof these connections, when shaft F is rotated, cran k -ar-m J is made to tilt frame E backward and forward, producing the desired oscillatory motion'of the grindstone. I, 7

If it be desired to impart only a rotary motion to the grindstone, the bent end j of the connecting -arm J can readily be detached from its seat in one of the sockets 7c of the block K, when the rocking or oscillating motion of the grindstone will cease, and a rotary motion only will be imparted to it.

The devices for holding the sickle while being ground are as follows: Top plate or crossplate B is provided with a horizontal rearward extension or guideway, B, which is provided at the side with vertical guide-flanges b 1). (Shown in Figs. 1 and 4.) N designates a plate, which is longitudinally slotted at n, and sets on said guideway between said flanges.

It is longitudinally adjustable therein, and is wheel,-N, on grindstone-shaft F. .Bymeans amped therein by means of a thumb-screw, to receive whichsaid guideway B, is screwpped. To a lug, t, on the front end of adjustle plate N is pivoted a block .or clip, 0, 1ich is capable of vertical vibration. To e front of said block 0 is pivoted the rear d P of a sickle-holder, P, which is capable lateral vibration thereon. Said rear end is extended both upward at and downird at p, as shown in Fig. 1. The face of 30k 0 is provided with two rigid lugs, 0 0, iich prevent said holder from being turned 0 far to either side. Said block is also proled with one upward-extending lug, O, and

'ward extension 12 of end P is provided with angular pivoted catch, Q, which may be rned down on either side of said upper lug so as to lock said holder in either lateral justment. Said catch is pivoted between 0 lugs on said upper extensionp, and is proled with a tailor small handle, q, whereby may be raised or lowered for looking or re .sing. a p The forward part of holder P consists of a ver support, R, having a forward-extending g, 1', at each side, and of an upper clamping.

rte or bar, S, havinga forward-extendingndle, S. Said lower supporting plate or ['R is provided with a lug,E/, which passes through a slot, 8, in upper plate S, and is )vided with cross-pins or studs 4" 1*,Iso as make a pivotal connection between said ites or bars. The rear end of said upper" mping-plate Sis vertically screw-tapped to :eive an adjusting thumb-screw, T, which trs' against lower supporting-plate B. "This 'ew regulates the tightness of the gripe of d holder upon sickle U. By means of plate N and extension or guide.- y B above described, said sickle may be lusted toward or from the said grindstone By means of the vertical pivoting hereinore described, said sickle may be raised so to be no longer operated on, and the same angement also allows a slight yielding of d holder P, which may preventinjury to sickle, or to parts of the apparatus hereefore described. By means of the lateral oting hereinbefore described, said sickle y be tilted to either side. This enables both edges of each triangularblade to properly scribed, of U-shap'ed' grindstone supporting frame'E enables said grindstone to be brought into contact with the water in the trough C,

after the diameter of said grindstone has been decreased by friction.

Gross-piece or crossplateBfmay be made vertically adjnstable on the standards A A by means of longitudinal slots and clamping screws or nuts, which are not shown, being contained in my previous patent, and formin g I no part of the present invention.

What I claim as new, and desire tosecure Y by Letters Patent, is-

l. A rotating andoscillating grindstone,

provided with a connecting -arm which is made detachable, ibrthe purposeot' "causing Y the oscillating motion of the stonetocease at the will of the operator, and the rotary motion to continue, substantially as described,

2. In combination withifixed trough G, the

vertically-adjustable tilting frame E and the grindstoneG, supported thereby, substam tially as set forth. I l

' 3. The pivoted block 0, having lugs o .0, and upward extension 0, in combination with the 'pivoted sickle-holder 1?, provided with projections'p 10 and catch 9 substantially as v described.

In testimony that I claim the'aboveI have hereunto subscribed my name in the presence of two witnesses.

HOMER S. STEVENS.

Witnesses: J

FRANCIS E.OLARKE, O. S LINCOLN. 

